CVE-2026-86145
Quick assessment
Affected
PCRE PCRE2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
在 10.48 之前的 PCRE2 中， 函数中存在一个越界写漏洞。其成因是：在递归 DFA 匹配过程中，当复用已缓存的工作空间（workspace）块时，缺少对大小的检查；尽管对于相同用途的新分配工作空间块是具备大小检查的。要触发该漏洞，需要攻击者可控制的正则表达式，或者结合较小的堆内存限制（可通过 API 设置）下的递归模式。
Possible ATT&CK Techniques 2 AI
T1598 · Phishing for Information T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-86145
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
PCRE2 before 10.48 allows a pcre2_dfa_match out-of-bounds write because reuse of a cached workspace block, in a recursive DFA matching workspace, lacks a size check (even though a newly allocated block, for the same purpose, does have a size check). This outcome requires an attacker-controlled regular expression, or a recursive pattern in conjunction with a small heap limit (this can be set through the API).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对候选路径的不恰当保护
Source: CVE Program / CVE List V5
Affected Products
II. Public POCs for CVE-2026-86145
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-86145 (1)
Vendor Pages for CVE-2026-86145 (1)
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V. Comments for CVE-2026-86145
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